Water-tube boiler.



lvm-7173913.` A l PATENTBD JAN. 6, 190s.

' H. B. PENNEY.

WATER TUBE BOILBR.

.APPLICATION FILED MAB. 7, 1902.

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No. 717,913. PATENTED JN. 6, 1903.

H. E. PENNEY.

WATER TUBE BOILER.

APPMGATI'ONLPILHD MAR. 7, 1902. No MODEL.

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HERBERT E. PENNEY, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO W. S. NOTT COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION.

WATER-'russ BOILER.

SPECIFICATION forming part of Letters Patent No. 717,913, dated January 6, 1903. l

` Application nea March 7,1902. sean Nt. 97,037. cromada.)

To all whom t may 0071.067017.:

Be it known that I, HERBERT E. PENNEY, a citizen of the United States, residing at Minneapolis, county of Hennepin, and State of Minnesota, have `invented certain new and useful Improvements in WaterTube Boilers, of which the following is a specification.

My invention relates to .vertical steam-boil ers of the sectional water-tube type; and its 1o principal objects are by improvement of the construction and arrangement of the waterlegs, headers, tubes, and steam-space to increase the efficiency of the boiler as a steamgenerator and to provide convenient means for the removal of the header and tube sections from the boiler.

My improvements are illustrated in the accompanying drawings, in which* Figure 1 is a vertical sectional View of a zo steam-boiler embodying my improvements. Fig. 2 is a plan View of Fig. 1, the hood and smoke-stack having been removed. Fig. 3 is a partial side elevation showing one of the header and tube sections raised above its normal position, as in removing it. Figs. f1 and 5 are detail views of one of the headers. Fig.

`(i is a sectional detail showing the means for` connectingthe header-sections and for joining the tubes to the headers, and Fig. 7 is a 3o detail View showing the means for connecting the lower end of a header to the water-leg.

In the drawings, 1 designates the inner, and

2 the outer, member of a pair of concentric vertical shells of different diameters, the outer shell being of-funiform diameter throughout its height, while'the inner shell is preferably made to taper somewhat from its base to its top. An annular space 3,that is wider in its upper than its lower portions, is thus pro- 4o vided. The two shells are connected by staybolts 4. or like devices for holding them against internal pressure. The annular space is closed at the bottom by a suitable ring 5 and at the top by a circular cap 6, and its lower portion is thereby adapted to serve as a water-leg and its upper portion as a steam-space.

The referencagure 7 designates the iiregrate; 8, the redoor; 9,- the combustionchamber; 10, the smoke-stack,and 11 the hood 5o over the top of the boiler. These features may be of any usual or suitable construction.

The water-tubes are arranged in series in parallel vertical planes, the tubes of each series or section inclining iu opposite directions from those of the adjoining sections. The headers or manifolds to which the tubes are connected are composed of two or more sections placed end to end and joined by removable couplings. As illustrated in the drawings, each complete header is made up of three portions placed in line, with the ends of the middle member operatively connected to the other two. For convenience and brevity of expression a complete vertical series of tubes and the headers to which they are attached will be referred to as a tube-section,

each of its three constituent parts as a sectional unit, and each separable header portion as a header unit. I

The header units 12 may be connected by short tubes or plugs 13, having oppositelyscrew-threaded end portions screwed into correspondingly-tapped holes 111 in the ends of the header units. The latter are provided in 'staggering order along their surfaces with tapped and suitably-inclined sockets 15 to receive the threaded ends of the water-tubes 16. Header units of the same construction may by reversing them be used for both ends of the tubes. The units thus formed having been connected by the plugs 13 to form a tube-section, theA latter is connected at its lower end to the water-leg 3 by means of pipecouplings 17, screwed into the ends of the lower header units, and hollow plugs 1S, adapted to screw into sockets in the elbows of the couplings and into holes in the inner shell 1. Nuts 19 are provided for turning the plugs, and other nuts 20 on the threaded outer portions of the plugs are adapted to be turned against the shellto insure tight joints. It is not essential that both headers of a tube-section be connected with the water-leg, but it is the preferable arrangement. The top of the header farthest below the head of the shells is closed, while the other, which eX- tends nearly to the top of the shells, is open and tapped and in it is screwed a short tube 21, that has its upper end reversely threaded and screwed into the end of a pipe-joint 22, the other end of which is. connected to a short pipe 23, that extends downward into IOO the top of the annular space between the shells. While only one of the headers is shown as thus connected to the upper annular space, the other may also be similarly connected. Tofreethetube-section forremoval, it is only necessary to unscrew the plugs 18 and the tube 21, whereupon the section may be lifted bodily out ot' the boiler, as indicated in Fig. 3, and its component units separated by removal of the connections 13.

Intermediate the upper portions of the shells 1 and 2 is a circular' partition 24, that divides the intervening chamber into two unequal annular spaces 25 and 26, the inner space 25 being the narrower. The returnpipes 23 communicate with the outer space 26 for discharging therein steam and water that rise from the tube-sections. A steampipe 27 is connected tothe upper portion of the inner4 space 25 and extends through the partition and outer shell for conducting away the steam which flows around the edge of the partition from the outer to the inner space. The water that has been carried over from the tube-sections into the space 26 falls to the body of water in the water-leg beneath.

In operation, the water-level being maintained at a point below the bottom of the partition 24, water enters the tube-sections from the leg, and when it becomes heated and steam is generated the latter, carrying with it more or less water, flows upward through the tubesections and their return connections into the head of the annular space 26, where a separation of the water from the steam takes place, the former falling to the leg and the latter rising in the inner space 25 and passing out through the pipe 27.

Having described my invention, what I claim, and desire to secu re by Letters Patent, 1s

1. In a steam-boiler, the combination with outer and inner vertical shells providing an annular water-leg intermediate their lower portions and an annular steam-space intermediate their upper portions, the outer shell being of uniform diameter throughout its height and the inner shell tapering gradually from its base to its top; of a series of sepalately-removable tube-sections arranged in parallel vertical planes, each tube-section comprising vertical headers and connectingtubes; and means for detachably connecting such tube-sections with the lower portion of the water-leg and the upper portion of said steam-space, substantially as set forth.

'2. In a steam-boiler, the combination with outer and inner shells providing intermediate annular water and steam spaces, of a series of vertically-removable tube-sections, each tube section comprising opposite vertical headers and inclined tubes connecting them, theinclinations of the tubes being opposite in adjacent sections, detachable pipe-coupling for connecting the lower ends of the headers with the water-leg, and detachable pipe connections leading from the upper ends of the headers and discharging downward into the upper space between the shells, substantially as set forth.

3. In a steam-boiler, the combination with outer and inner vertical shells providing an annular water-leg intermediate their lower portions and an annular steam-space intermediate their upper portions; of a pendent partition dividing the upper portion of the steam-space into inner and outer annular chambers that are closed at the top and sides and open at the bottom.; headers and connecting-tubes, the headers being connected below with the water-leg and 'above with said outer chamber; and Ineans for conducting away steam from said inner chamber, substantially as set forth.

4. In a steam-boiler, the combination with outer and inner vertical shells providing an annular water-leg intermediate their lower portions and an annular steam-space intermediate their upper portions; of a pendent partition dividing the upper portion of the steam -space into inner and outer annular chambers that are closed at the top and sides and open at the bottom; a series of separately-removable tube-sections arranged in parallel vertical planes, each tube-section comprising vertical headers and connectingtubes; means for detachably connecting such tube-sections with the lower portion of the water-leg and the upper portion of said outer chamber, and means for conducting steam from said inner chamber, substantially as set forth.

5. In a steam-boiler, the combination with outer and inner vertical shells, the outer shell 'being of uniform diameter throughout its height and the inner shell tapering gradually from its base to its top and providing an annular water-leg intermediate their lower portions and an annular steam-space intermediate their upper port-ions; of a pendent partition dividing the upper portions of the steam-space into inner and outer annular chambers that are closed at the top and sides and open at the bottom; a series of separately-removable tube-sections arranged in parallel vertical planes, each tube-section comprising vertical headers and connectingtubes; means for detachably connecting such tube-sections with the water-leg and the upper portion of said outerchamber, and means for conducting steam from said inner chamber, substantially as set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 1st day of March, 1902.

HERBERT E. PENNEY.

Witnesses:

P. H. GUNCKEL, M. F. HARRISON. 

